Adjustable tool holder for lathes, etc.



July 1, 1930. c. E. HENR'Y I 1, 2

ADJUSTABLE TOOL HOLDER FOR LATHE-S, ETC

Fi-ld Dec. 12, 1927 Patented July I, 1930 amen, I

CLAYTON E. rinnnyjor KANsAsQ CITY, xausns nssisnonor O E-Hetero H; J;

,1 BRILL, or KANSAS crrY, MISSOURI p QADJUSTA LETOoL HOLDER fronLA'rHE's', n'rc; I

Application filed December 12', 1927. Serial 1%, 239,441.

This invention! relates tortoolsholders for n lathes, shapersandf-thelike Conventional practice providesvfor anumber of differentholders to meet most requirements, but; ojccasionally a piece ofworkiconfronts an operator which cannot be done through the use of anyof the, conventional holders unless: the stockor article is firstre-chucked in reversed position, and the re-chucking operation; isalways avoidedif possible because-it takeslup about thirty minutes" ofskilled operators time and hencemayl-makethe cost of the workprohibitive, a 1 y w r a It is my;object, thereforei, to produce'a toolholder ofsuch character that it will not only accommodate most of thetools for lathe and shaper work on the front or sides of the stock orarticle, but also provides for efiicient operation by the tool on theback of the stock or article, regardless of the size thereof, and

without necessitating the re-chucking of the latter. r r

Accordingly I have provided a holder having a head containing ahorizontally-split collar of spring steel or the like, for holding thetool, and a clamping means whereby'the collar may be caused to so gripthe tool that 'the latter shall be incapable of: movement in anydirection, the collar'being adapted for rotative adjustment whenunclamped top'rovide for the proper or desired setting or direction ofthe tool. In the preferred construction, the head of the holder isforked, and of spring metal and the clamping means clamps the fork endsor aws upon the collar to cause the latter to perform its clampingfunction onthetool.

With the object named in view the invention consists in certain noveland useful features of construction and combinations of parts ashereinafter described and claimed; and in order that it may be fullyunderstood,

.reference is to be had to the accompanying drawing, in which:

Figure 1 represents diagrammatically a top view of a portion of alatheand a piece of Work thereon, and also discloses a tool holder? embodyingthe invention, in operativepo'si tion;

Figure 2 is aside viewof the same}.

the com e acon ac gwit i O i t e V Figure 3 isan end view of the toolholder. Figure l is a sideview of the tool'holder withthe operative endin central-vertical 1ongitudinal section; and: also shows a toolclamped; in operative position in the holder.

Figure-51s a sectional viewo'f a slightly modified construction of theholder.

'Referringwnowto th drawmg in detail, 1

indicates the conventionaltoolpost of a lathe,

' and 2 the shank of a toolholderto be clamped V rigidly. in the post inthe customary manner.

I l The operative end of the holder terminates in. anenlargement or head3 horizontally bifurcated in Figures 1 m4 inclusive,to provide upperand, a lower. arms I which-5 are, of spring metal: and serve-asclampingj aws,,the upper rm j w avi g a t ind ica p a e and} the lower armor awa threadedgpassage 5 Lin alinement withQpassage t J ,Fittingjnthe bifffiCELlYlOIL' sa collar Bethe bore ofthe samebeing alinedlwiththepassagef 4,,andisaid1 o nt is provided horizontally "with; aslitfl so; thatthe, parts. overlying and ,underlying the slit shall constituteuppejrandlower jawathe collar; beingof spring; metal a d the saidljaws of 'thecollar tendingto'sep arate: rThefcollar is providediat one side of itsaxis; with an: angular. passage 8"f'co nj ointly formedintthezasaidljawsand adapted for the rreceptibnflfi an angularltoolfi);

t l h tlt li h li l t Q II in e lof ah ad-10am; a stem; e s t j a,smooth cylindrical-upper portion llfiand a; threaded-[port no 12),portion 11f being adapted'toF'engag 'epassage, 4 and' portion that br addpas g 1- to pr v s moyaibi o first nernqving the tool'and to,v avoiimaking tlie; collar of: gneater diameter! than 1160- he bolt homin headwithepi a is; .qrf r duced; diameter at;..1e, 2 the "tool" extending,,ztllrough said; recess .and' into the. patl ll off suff cientwithdrawing movement of. the fl QQQII? to; unclampithe tool before,

dloff the threaded portion can f f so- A boltextendingthroughthe'passagesgof turned backward to a sufficient extentto parent that the screwing home of the bolt will cause the headthereo'ftoclamp down upon the upper side of the collar directly insteadof through the upper jaw of the head. This represents ahmodificationwhich is the same in principle but not as desirable, as by the preferredconstruction a wider clamping'area on the collar, is provided.

Referring nowtoFigure 1, 0 represents chuck jaws of the lathe and d,'apiece of work mounted therein and: provided with a relatively large heade. lVith the ordinary tool holder, the tool'can' be brought to bear foroperative purposes on the face or edges of the head 3, but cannotbe-brought to bear efiiciently, if at all, onthe back of the work,because withthe ordinary tool holder the tool projectsgenerallyinapproximately lon itudinal alinement withthe shank of the ho der. With'asmall head 0' which will permit the carrier f of thelathe to pass belowit, it is possible to use the ordinary tool holder for use of the toolon the back of the head, but i with a piece of work with a head e, ofsuch size as to limit the movement of the tool post From the abovedescription it will be apparent that I have produced a tool holderembodying the feature of advanta e set forth as desirable in thestatement of t e object of the invention, and which is susceptibleof=modification in minor articulars without departing from the principle ofconstruction involved or from the spirit and smipe of the appendedclaim.

claim: A tool holder having a horizontally forked 1 spring-metal headproviding a pair of spaced aws, said jaws having alined passages, the

passage intone being smooth and the passage in the other threaded, aheaded bolt extending through said jaw passages and havin a smoothportion in the smooth passage and a threaded portion in the threadedpassage,

and a horizontally :slit s ring-metal collar fitting between the jaws 0the head and revoluble therein, the bore of the collar being inalinement with the passages of the jaws and of larger diameter than thethreaded portion of the bolt, said collar being also provided atone sideof the bolt with a toolreceiving cross passage formed conjointly by thejaws formed by the slit.

In testimony whereof I aflix si ature. a CLAYTON E. l IEg RY.

1 towardthe head stock, it is impossible with the ordinar tool holder toapply the tool to the back 0 the head e. Figures 1 and 2 indicate ahead'6, of such size that the carri'ercannot pass below it, but by arrangingtheholder to project toward the head stock, 1 the sleeve can be adjustedrotatably to disthe tool against the back of said head e,as"shown. Thebolt lO-is then turned to I clamp the tool in the desired position andthen the manipulation of the lathe occurs in the conventionalfmanner.With this argroove or fini shthe back of a head such ase,

rangement it is possible therefore to face 011,

v without re-chucking the piece of work, and I i "the avoid nce of there-chuckingoperation results in a substantial saving. H

jIt'will be noted that the bifurcation of the "tool' holder ishorizontal transversely but exi tends at an angle when disposedlon'gitudi- V iof the shank, and that the clamping bolt extendsperpendicularly to such angle.

This/angulardisposition isjfor conventional purposes, that is, forpermitting. the tool nor mally to incline slightly upwardand thus fa-'cilitatefthe'separation of shavings from the i rt shaved. v-Of coursewhen the tool adusted to extend at right anglesto the shank hisslightangular arrangement advantage i is not present, but it is onlyoccasionallythat the tool will be set in the position last named.

